Countries are mapped to continents using data from the United Nations Statistics Division. You can see the actual mapping used by the API here.
There are three ways to use continent filters:
Authors
/authors?filter=last_known_institution.continent:<continent>
Institutions
/institutions?filter=continent:<continent>
Works
/works?filter=institutions.continent:<continent>
Available values for the <continent>
filter are:
You can group by continent.
Group institutions by continent
https://api.openalex.org/institutions?group-by=continent
Response:
Groups are available in these endpoints:
Authors
/authors?group-by=last_known_institution.continent
Institutions
/institutions?group-by=continent
Works
/works?group-by=institutions.continent